41/50
41. Maní, São Paulo, Brazil

42/50
42.= Boragó, Santiago, Chile

43/50
42.= Tickets, Barcelona, Spain

44/50
44. Maido, Lima, Peru

45/50
45. Relae, Copenhagen, Denmark

46/50
46. Restaurant André, Singapore

47/50
47. Alain Ducasse au Plaza Athénée, Paris, France

48/50
48. Schloss Schauenstein, Fürstenau, Switzerland

49/50
49. Blue Hill at Stone Barns
Pocantico Hills, USA

50/50
50. The French Laundry
Yountville, USA

Standing at 180 metres high, the Tower was opened by Prime Minister Harold Wilson on 8 October 1965, with the public restaurant opened by Tony Benn, then Postmaster General, and Billy Butlin, owner of the eponymous family holiday parks, the following year.

Since its opening, the Tower has featured in several films and a series of Doctor Who.

Gavin Patterson, BT Group chief executive, said: “The BT Tower was a unique feat of engineering when it was first built and it remains an important and much loved building today.

"It has been a working icon of technological innovation for 50 years and what better way to celebrate that than by opening it to the public.”